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Physical Review C 60 (1999) 057301
Electromagnetic transitions and $\alpha$ decay of the $^{223}$Pa nucleus
F. Hoellinger1, B.J.P. Gall1, N. Schulz1, N. Amzal, P.A. Butler, P.T. Greenlees, D. Hawcroft, J.F.C. Cocks, K. Helariutta, P.M. Jones, R. Julin, S. Juutinen, H. Kankaanpää, H. Kettunen, P. Kuusiniemi, M. Leino, M. Muikku, D. Savelius

Actinides with N~132 present the best explored region of pear shape nuclei. Still almost no spectroscopic information is available for the heaviest elements, Z=91–98, which are predicted to be octupole instable. The lack of data for the latter nuclei results from the high fission probability encountered in the heavy-ion reactions used to populate them. In order to overcome this handicap, an alpha -decay tagging technique was used to identify gamma rays in 223Pa produced through the 208Pb(19F,4n) reaction. A new value of 4.9(4) ms for the half-life of 223Pa was obtained as a by-product
1 :  IReS - Institut de Recherches Subatomiques
Physique/Physique Nucléaire Expérimentale